From | "Araujo, Edson" <EAraujo@qmu.ac.uk> |
To | <statalist@hsphsun2.harvard.edu> |
Subject | st: append |
Date | Sat, 8 Mar 2008 14:37:54 -0000 |
Dear STATA lister, When using the command "append" to combine datasets what to do if the same variables have different alternatives in the different survey editions (as in the example below - 2006=4 answers and 2002=3 answers)? Is it a problem or can be ignored? Thanks! Edson use "C:\Documents and Settings\aksd\stata1\dataset2006.dta", clear ta literacy for those with codes | 10-17 in column 4 aged | 10years and abov | Freq. Percent Cum. -------------------------+----------------------------------- unable to read and write | 6,177 34.56 34.56 able to read only | 896 5.01 39.57 able to read and write | 10,797 60.40 99.97 uses braille | 5 0.03 100.00 -------------------------+----------------------------------- Total | 17,875 100.00 . use "C:\Documents and Settings\aksd\stata1\2002\dataset2002.dta", clear . ta literacy liter | Freq. Percent Cum. ------------+----------------------------------- 1 | 7,670 30.64 30.64 2 | 1,450 5.79 36.43 3 | 15,912 63.57 100.00 ------------+----------------------------------- Total | 25,032 100.00
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